Although ED drugs have similar modes of action, each drug is composed of different chemical substances, so the mode of action (pharmacology), onset time, and side effects are all different. Choosing ED drugs requires selecting the most suitable medication based on one's specific situation.

Ensure sufficient efficacy time

Most ED drugs do not have immediate effects and require waiting for a period of time after taking them to take effect. The waiting time varies depending on the medication. Viagra (sildenafil) and vardenafil take effect about 30 minutes after taking, and the efficacy lasts for about 4 hours. Tadalafil needs to be taken 2 hours in advance, but the effect lasts up to 36 hours.

Don't eat a big meal after eating small blue chips

Research has found that consuming large meals (such as high-fat foods like steak) after taking Viagra may prolong the time it takes for Viagra to exert its effects. ED drugs such as Avanafil, Tadalafil, and Vardenafil are suitable for use on an empty stomach or in combination with food.

Don't rush sex

ED drugs can enhance the effect of nitric oxide in the male body, which can relax the muscles in the genital area, improve blood circulation, and help with erections. During sexual intercourse, doing foreplay can enhance the efficacy of ED drugs.

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Precautions for using genuine erectile drugs